VADDSUBPD X20, X1, X2           // ERROR "invalid instruction"
	VADDSUBPS X0, X20, X2           // ERROR "invalid instruction"
	// Use of K0 for write mask (Yknot0).
	// TODO(quasilyte): improve error message (#21860).
	//                  "K0 can't be used for write mask"
	VADDPD X0, X1, K0, X2           // ERROR "invalid instruction"
	VADDPD Y0, Y1, K0, Y2           // ERROR "invalid instruction"